RESUMO

A 49-year-old female patient, asymptomatic, presented to the cardiology office for a right atrial mass, identified incidentally in a non-electrocardiogram (ECG)-gated contrast-enhanced computed tomography, performed for follow-up of pulmonary tuberculosis. Echocardiography, surprisingly, showed an anechogenic ovoid mass in the right atrium measuring 40 × 40 mm2, implanted in the interatrial septum without affecting the tricuspid valve. ECG-gated computed tomography angiography (CTA), confirmed the dimensions of the mass, which presented homogeneous content, calcified areas, and a 12-mm pedicle implanted near the ostium of the coronary sinus. Additionally, contrast uptake and infiltration of adjacent structures were ruled out. In the surgical field, an encapsulated mass with blood content was found, which pathology reported as a hematic endocardial cyst (HEC). These are rare cardiac masses, constituting 1.5% of all primary cardiac tumors. It is usually an incidental finding, and its clinical presentation will depend on its dimensions and the intracardiac hemodynamic impact. A highlighting feature is its anechogenic content on ultrasound, however, multimodality imaging allows for making diagnostic assumptions, discerning between primary cardiac tumors, and provides morphological and hemodynamic information useful for therapeutic decision making. The age of the patient, the large size of the HEC, and its location in the interatrial septum make up a completely atypical presentation of this rare disease, which motivated this report.

RESUMO

Las lesiones tumorales de localización parafaríngea presentan una escasa incidencia, representando entre el 0,5 y el 0,8% de todas las tumoraciones de cabeza y cuello. Aproximadamente el 80% presentan un comportamiento benigno. La singularidad de dichas lesiones deriva de su compleja situación anatómica y de la clínica con la que suelen debutar, siendo en la mayoría de los casos inespecífica y casi siempre derivada del efecto compresivo producido por la lesión sobre la oro y rinofaringe. Los Schwannoma del espacio parafaríngeo son tumores muy infrecuentes, que se originan de la vaina de schawnn, generalmente de crecimiento lento, suelen ser asintomáticos. El tratamiento es quirúrgico, muchas veces complejo por la localización anatómica. Se presenta el caso de una paciente femenina de 42 años de edad con diagnóstico de Schwannoma en la región parafaríngea izquierda demostrada mediante biopsia incisional; realizándosele tratamiento quirúrgico, el cual se llevó a cabo sin complicaciones.

Parapharyngeal tumor lesions present a low incidence, representing between 0,5 and 0,8% of all head and neck tumors. Approximately 80% show benign behavior. The uniqueness of these lesions derives from their complex anatomical situation and the symptoms with which they usually appear, being in most cases nonspecific and almost always derived from the compressive effect produced by the lesion on the oropharynx and the oropharynx. Schwannomas of the parapharyngeal space are very rare tumors that originate from the sheath of schawnn, generally slow growing, and are usually asymptomatic. Treatment is surgical, often complex due to the anatomical location. The case of a 42-year-old female patient with a diagnosis of Schwannoma in the left parapharyngeal region, demonstrated by incisional biopsy, is presented; undergoing surgical treatment, which was carried out without complications.